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[Launchpad Bug Tracker <1398999@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package libvirt - 1.2.16-2ubuntu9

---------------
libvirt (1.2.16-2ubuntu9) wily; urgency=medium

  * Add upstream patches implementing a '--migrate-disks' option to virsh
    migrate to specify block devices to migrate.  (LP: #1398999)

 -- Serge Hallyn <serge.hallyn@xxxxxxxxxx>  Fri, 04 Sep 2015 09:29:52
-0500

** Changed in: libvirt (Ubuntu Wily)
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1398999

Title:
  Block migrate with attached volumes copies volumes to themselves

Status in OpenStack Compute (nova):
  Confirmed
Status in libvirt package in Ubuntu:
  Fix Released
Status in nova package in Ubuntu:
  Triaged
Status in libvirt source package in Trusty:
  New
Status in nova source package in Trusty:
  Triaged
Status in libvirt source package in Utopic:
  Won't Fix
Status in nova source package in Utopic:
  Won't Fix
Status in libvirt source package in Vivid:
  New
Status in nova source package in Vivid:
  Triaged
Status in libvirt source package in Wily:
  Fix Released
Status in nova source package in Wily:
  Triaged

Bug description:
  When an instance with attached Cinder volumes is block migrated, the
  Cinder volumes are block migrated along with it. If they exist on
  shared storage, then they end up being copied, over the network, from
  themselves to themselves. At a minimum, this is horribly slow and de-
  sparses a sparse volume; at worst, this could cause massive data
  corruption.

  More details at http://lists.openstack.org/pipermail/openstack-
  dev/2014-June/038152.html

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